* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    font-family: 'Microsoft YaHei', sans-serif;
    background: linear-gradient(120deg, #84fab0 0%, #8fd3f4 100%);
    height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
}

.login-container {
    background: rgba(255, 255, 255, 0.9);
    padding: 2rem;
    border-radius: 10px;
    box-shadow: 0 0 20px rgba(0, 0, 0, 0.1);
    width: 100%;
    max-width: 400px;
}

.login-box {
    text-align: center;
}

.logo {
    width: 80px;
    margin-bottom: 1rem;
}

h2 {
    color: #333;
    margin-bottom: 2rem;
}

.input-group {
    position: relative;
    margin-bottom: 2rem;
}

input {
    width: 100%;
    padding: 10px;
    border: none;
    border-bottom: 2px solid #ddd;
    outline: none;
    font-size: 16px;
    transition: border-color 0.3s;
}

label {
    position: absolute;
    left: 0;
    top: 10px;
    color: #999;
    transition: all 0.3s;
    pointer-events: none;
}

input:focus + label,
input:valid + label {
    top: -20px;
    font-size: 12px;
    color: #4CAF50;
}

input:focus {
    border-bottom-color: #4CAF50;
}

button {
    width: 100%;
    padding: 12px;
    background: #4CAF50;
    color: white;
    border: none;
    border-radius: 5px;
    cursor: pointer;
    font-size: 16px;
    transition: background 0.3s;
}

button:hover {
    background: #45a049;
} 